System



L. L. JONES TRAIN CONTRQL SYSTEM Filed June a. 1929 Jones RNEYS INVENTOR Lesfer llllIlll A l l Jan. 27, 1 931.

Patented Jan. 27, 1931 ,UNETE, srATEsPATENr OFFICE LEs'rERL. JONES, or onAnELn, NEW JERSEY TRAIN-CONTROL sYsrEM Application filed June 6, 192a SerialNo. 283,159.

' ably-operable automatically with vehicles or trains equippedwith different induction systems, such as the Regan inductionsystein in which a train carried inductor is normally energized by A. C. and the General Railway Signal Co. induction system, in which a train carried inductor is normally energized by D. Q, moving over the same tracks or operating in the same territory. 7

i In one of the Be an types of induction traincontrol systems, as disclosed,ffor example, in the applications forLet-ters Patent of Lester L, Jones, Ser. No.-165,612, filed Feb.

3, 1927, or Theodore Bodde, Ser. Nog1l5,192,

filed Oct. 30, 1926, a vehicle carried inductive an apparatus cooperates with aroadside inductive apparatus for producing danger and 9 clear train control indications in response to danger and clear roacside condi tions, the said roadside "inductive apparatus comprising an inductor arranged in acircuit devoid of an energy source, thesaid circuit when open producing the danger indication in the vehicle carried inductiveappa ratusand the said circuit when closed pro 0 ducing a restoring or clearing indication in the vehicle carried inductive apparatus. To produce theclearing or restoring indication,

the roadside inductor circuit comprises a closed circuit which ismade resonant to respond to the vehicle carried inductive apparatus and pro'duce'in the vehicle carried 1n- 'ductive apparatus the restoring or clearing influence. v In the General Railway Signal Co. (G. R. S.) induction system, as disclosed for ratus disclosed and'generically-claimed-in the example in the patent to C. S. Bushnell No. 1,578,87 6 of March30, 1926, the vehicle carried inductive apparatus and the roadside inductive apparatus are designed so that under a danger roadside condition the vehicle inductor is influenced to produce a. an er?" Indication on the train, and so that under clear roadside conditions the roadside iii=- ductive' apparatus does not actively influence the vehicle carried inductive apparatus, the '60 .clearing or restoration of'the vehicle carried apparatus being accomplished by some other means. Under clear roadside conditions, the roadside inductive apparatus comprises aninductor ina closed circuit of low impedance or lowo-hmic resistance. i

I In theoperation of trains equippedjwith these two different types of train control systems .moving. over a froadbe-d equipped with the Regan type of roadside apparatus, 7 it isfound that the closed tuned circuit of the Regan roadside inductive apparatus effects a danger producing influence inlieu of a passive influence on the vehicle carried inductive apparatus of the aforesaid GpR. S.

type of system,fthis being due to the fact that the tuned circuit. acts or behaves as an open clrcuit for the G 'R. S. vehlcle carried inductive apparatus. 'Inl accomplishing the desiderata of my present invention, the roadside inductive apparatus of my nvention is so designed and organized that when cooperating on'closed circuit(clear roadside con ditions), with avehicle equipped with the Regan inductive apparatus, the roadside circult is, resonant or tuned and'therefore of one impedance,- and when cooperating with vehiclesj equipped withG. B. S, inductiveapparatus, the roadside circuit is untuned and of alow ohmicresista-nce and therefore'of a different impedance, the'change from a circuit of one impedance to. a'circuit of another impedance being automatically and selectively accomplished. by the said different v types of vehicle carried inductive apparatus.

The apparatus of 'mypresent' invention for accomplishing these results. comprises improvements in the roadside inductive appacopcnding application of Benjamin W. Meisel, Ser. No. 283,225, filed June 6, 1928.

To the accomplishment of the foregoing and such other objects as will hereinafter appear, my invention consists in the elements and their relation one to the other, as here inafter more particularly described and sought to be defined in the claims; reference being had to the accompanying drawings which show the preferred embodiment of my invention, and in which:

Fig. 1 is a wiring diagrammatic view of a roadside inductive apparatus embodying the principles of my present invention, and showing the same cooperating, with a G. R. S. direct current type of vehicle carried inductive apparatus,

Fig. 2 is a wiring diagrammatic view of the same demonstrating its operability with a Regan type of vehicle carried inductive apparatus, and

Fig. 3 is a wiring diagrammatic view of an improved and preferred form of construction showing the same applied to a railway block or track section.

Referring now more in detail to the drawings, and having reference first to Figs. 1 and 2 thereof, the inductive apparatus of the invention is shown to comprise a roadside inductive equipment generally designated as A coc-perable either with a vehicle carried inductive apparatus such as B, shown in Fig. 1 of the drawings, or a vehicle carried inductive apparatus such as B, shown in Fig. 2 of the drawings, the roadside inductive apparatus A being operated in response to roadside conditions either manually or automatically from blocl: signaling equipment.

The roadside inductive apparatus A comprises an inductor I which preferably embodies a construction as set forth in the aforesaid Jones application, including a coil 13 and core 14 and a circuit C devoid of an energy source connected to the inductor and controlled by a contact NC which may be either operated manually or may in: turn be controlled by a signal relay operated in response to roadside conditions, in any manner well known to the art, from the block signaling equipment. When used for either the Regan or G. R. S. types of train control systems, the circuit C is open for producing a danger indication in the vehicle carried equipment (B or B) and the circuit C is closed for producing either a passage clear condition (for the vehicle inductor B) or an active restoring influence on the vehicle carried equipment (for the vehicle inductor B).

For rendering the roadside inductive apparatus A interchangeable for use with the different vehicle equipments of the two systems referred to, the inductor C is changed from a closed circuit of one impedance to a closed circuit of another impedance; and

more specifically, this circuit is changed from a closed circuit of low ohmic resistance for cooperation with the vehicle inductor B (Fig. 1) to a closed circuit which is tuned or resonant for cooperation with the vehicle inductive apparatus B (Fig. 2). As set forth in the above referred-to Meisel application, when the Regan vehicle carried inductor ii moves over the roadside inductive apparatus such as A, the circuit C may be energized sutliciently to operate a selector device such as relay, and this selector device may 3 utilized for operating circuit changing instrumen alities in such a way as to produce the desired changes in the circuit constants of the inductor circuit C. This may be accomplished in any of a number of ways, but preferably for simplicity of construction the said selector device is arranged in the inductor circuit C so as to be influenced thereby to produce the circuit changes and so as to control the said circuit to selectively produce the change in the constants therein.

T objects of the invention are accomplished by the provision of a selector or rclay R arranged directly in the inductor circuit C, the said. relay controlling an armature 15 normally closed on its back contact 16 as shown in Fig. 1, the back contact being connected by means of a conductor 17 to a section of the coil of the relay R between taps 1 and 3 thereof, the armature 15 having a companion contact 18 connected to a conductor 19. these parts being arranged in series w'th the inductor I and the signal control contact NC all constituting the circuit C. In shunt or parallel with the contacts 16153 there is provided a tuning condenser K, the said condenser being connected at one end to the conductor 19 and at its other end to a mid tap 2 of the coil section 13 of the relay R.

I have found that the desired results may e effectively accomplished by making the Iql213 B a combination relay transformer constructed so to be rendered resonant when influenced by a vehicle carried inductor such as B (Fig. 2) for effectively operating the armature 15 and. contacts 1(5-18. This relay is therefore made to comprise a primary section 9 between taps 1 and 3 previously described and a secondary section. a between taps 1 and l; and to said. secondary section .9 is connected a condenser K selected in value or magnitude for re dering the circuit of the secondary s substantially resonant to the frequency employed for the type of vehicle carried. inductor B. Vith this recited construction, when a G. R. S. direct current type of vehicle inductor such as B, Fig. 1, moves over the inductor 1, the relay is not influenced to open the contacts 16, 18, all as shown in Fig. 1 of the drawings, and the inductor I is thus governed by a c osed circuit of low ohmic resistance through the 1. v 7 vehicle inductor such as; B (F overthe-inductor I, the relay R isenergized to attract the armature and to open and inaintain open the'contacts 16, 18 duringthc theGmRQS-"vee when a Regan 5 2) moves cooperative movcmentof the vehicle inductor B over the roadside induct-or I, thus in troducin a closed circuitunade resonant or tuned bythecondenser K (the tuned circuit being through that section of the primary coilqpbetween taps 2 and'3), which tuned closed .circuit is suitablefor use with the lie gan'type. of vehicle carried apparatus B for Gfi6Ct111g a restormgsor clearing influence thereon. .It will: be :unoerstood-that these cir- Ycuits are closed in response to the clear roadside-condltionslwhich effect the closing of the other-contact NCinthe inductor cir- The vehicle carried inductor B is more specifically 's'et if'orth' inthe Bushnell patent above identified, flllCh'OODlPllSQS a b shaped corehaving-two' depending legs, one; leg carcle carried apparatus, In operation, movement'of the vehicle inductor B over theroadsi'de ndu'ctorl inducesa voltagein the soondary-S similar'tothat of a single cycle of alternatingcurrent F and acurrent wave is prod'ucedinthe-roadside Qwhich is 01 a low frequency pulse-of the order of for example 1/30 seconds ;(-varying With-the .speed'oftrain movement).

The Regan vehicle carried inductor-113; comprises a. 'U-sh-apedcore having a pr1- i mary-iP connected to anvalternating current energy'source 20- of about 360 cycles and a secondary coil. S. connected'to two coil sections W andNV arrangedon opposite sides of the primaryPt, the 'said secondary being connected to a relayRf (in agcircuit which fis tuned or j made resonant a condenser .C.

When the vehicle inductor. B moves overthe roadside inductorz l, a rest oring or energizing nfluence is produced 11 1 the. veh cle. relay. R

:when'the roadside circuit-C isclosed and-substantially resonant to t he frequency; of the alternator 20. The movement oflthevehicle inductor B; ,overthe roadside inductor I causes the inducing of; a current of thealternato'r frequency in the, roadsidev circuit C whichresultsin energizingthe resonantsece V ,ond'ary circuit s of the transformer relayB' despite. :the shunt circuit through the con "tact 16, the ener 'ization being sufficient to attractthesarmature 15 and opentherelay contacts 16, 18, the openingof'these con- .tacts resulting in a strengthened operatlonof the relay-and attractionof the armatureflfi The cooperation of the partsis such thatdur .insec p rat e rem n e herehic inductor B over the roadside inductor I, the

shunt conductive circuit through the contact fect for accomplishing the restoring influence on the vehicle inductor.

An example of the magnitudes of the vari ous constants which may be employed in the roadside circuit may now be given. The number of turns between taps 1 and 2 of the relay R is preferably 120, the number of turns between taps 2 and 3 is preferably 60, the condenser K may be a 3.1nicrofarad condenser, the resistance of the coil section included in the circuit of low ohmic resistance is less than 1 ohm, and the condenserK is preferably 0.12 Inicrofarads. The closing pressure of the relay contacts may be augmented by a spring 21, the tension of which is sufficient to require the use of .180 amperes through the whole relay winding for lifting the armature 15 through an air gap of .OLOinches. This circuit combination-requires theuse of 0. 170 amperes in the tracksidecircuit to raise the armature when the trackside current is widely difi'erent from 360 cycles; For example, a direct current or tion disclosed in Fig. 30f the drawings.

The inductive circuit of Fig. 3'of1the drawings is shown appliedto signal blocks or track sections a; and 1 controlledby the signal apparatus, the said signal apparatus comprislng a track relay 'TR controlling contacts '22 and 23 of circuit connected to the block in advance. said circuit including a signal-relay SB. -The sienaljrelay SR;con-

trols a neutral contact NC polar contactPC connected to govern the roadside inductor circuit Ce The signal apparatus also includes the semaphore blade 24- which may directly; operate a circuit breaker CB, closed the position of the semaphore. It will be understood that under clear conditions with the use of this signal apparatus the contacts PC, NC and CB are closed, as shown in o of the drawings, and that under eitherYcaution or danger conditions one or more of these contacts is open.

'lh e' selector device for the roadside circuit C comprises the separated?transformer and relay elements and B respectively,

; thesaid transformerfl. comprising a primary P arranged in the circuit C and a secondary S to which the relay element R is connected through a condenser K The relay element it controls the armature l8 normally making back contact with a contact 16 connected to a conductor 17, and in shunt with these element ie is arranged the condenser K lVith this arr ement, it will be seen that all of the current induced in the roadside circuit C derivable from the G. R. S. type of vehicle inductor (B) traverses the primary P of the transformer T and thus has no direct influence on the relay element R the resonant circuit of this relay clement substantially inhibiting .any tendency to operate the relay element under these conditions. Therefore when the roadside inductive apparatus cooperates with G. R. S. inductor such as B, the contacts 16, 18 remain closed to produce the conductive roadside circuit of low ohmic resistance. Howeveig, when the roadside inductor I cooperates with a Regan vehicle inductive apparatus B, the resonant circuit of the transformer secondary S and relay elen'ient R is energized to open and maintain open the relay contacts 16, 1S during the cooperative movement of the vehicle inductor B over the roadside inductor I as described.

The method of tapping the primary of the transformerrelay'shown in Fig. 2 of the drawings may desirably be ca'ried out for the system shown in Fig. 8 of the drawings, as indicated by the conductors represented by the dotted line which is inserted in lieu of the short conductor 26. This method of tapping is provided for the purpose of reducing the resistance of the circuit 0 through the tuning condenser K" when said tuned condenser is in effective operation. lVith this last described circuit, the entire primary coil 1? is used for energizing the secondary circuit and the relay R and when the relay is energized and its contact 18 attracted, a portion of the coil P is sufficient for maintaining the resonant condition of the secondary S. The use of this tapped portion of the primary P, therefore, after the contact 18 is opened sufiices to maintain the resonant secondary circuit energized and introduces a reduced resistance in the tunedcircuit C.

The use and operation of the roadside inductive apparatus of my present invention and the advantages thereof will in the main be fully apparent from the above detailed description thereof. It will be further apparent that while I have shown and described my invention in its preferred form, many changes and modifications may be made in the structure disclosed without departing from the spirit of the invention, defined in the following claims.

What I claim is:

1. A roadside inductive apparatus comprising a roadside inductor circuit having constants changeable to suit different types of vehicle carried inductive apparatus with which said roadside inductor circuit is cooperable, and roadside means substantially resonant to one of said different types of vehicle carried inductive apparatus and adapted to be influenced thereby for selecting the constants for said roadside inductor circuit cooperable with said one of the different types of vehicle carried apparatus.

2. A roadside inductive apparatus comprising a roadside inductor circuit changeable in constants from a closed circuit of one impedance to a closed circuit of another impedance to suit different types of vehicle carried inductive apparatus with which said roadside inductor circuit is cooperable, and roadside means substantially resonant to one of said different types of vehicle carried inductive apparatus and adapted to be influenced thereby for selecting the constants of said roadside inductor circuit of an impedance cooperable with said one of the different types of vehicle carried apparatus.

3. A roadside inductive apparatus comprising a roadside inductor circuit operating on the normally closed circuit principle and having closed circuit constants changeable to suit different types of vehicle carried inductive apparatus with which said roadside inductor circuit is cooperable, and roadside means substantially resonant to one of said different types of vehicle carried inductive apparatus and adapted to be influenced thereby for selecting the constants for said roadside inductor circuit cooperable with said one of the different types of vehicle carried apparatus.

4. A roadside inductive apparatus comprising a. roadside inductor circuit having constants changeable to suit different types of vehicle carried inductive apparatus with which said roadside inductor circuit is cooperable, and roadside means controlled by said circuit, said roadside means being sub stantially resonant to one of said different types of vehicle carried inductive apparatus and adapted to be influenced thereby through said circuit for selecting the constants for said roadside inductor circuit cooperable with said one of the different types of vehicle carried apparatus.

5. A roadside inductive apparatus comprising a roadside inductor circuit changeable in constants from a closed circuit of one impedance to a closed circuit of another impedance to suit different types of vehicle carried inductive apparatus with which said roadside inductor circuit is cooperable, and roadside means substantially resonant to one of said different types of vehicle carried inductive apparatus and adapted to be influenced thereby for changing the constants for said roadside inductor circuit from said one impedance to another to render the circuit Ill) cooperable with said one of the different types Ofj-VQlllClG carriedapparatus the said circuit with said one impedance being cooperable withanother of said types of vehicle car ried inductive apparatus. 7 r

6. The roadside inductive apparatus of claim in which the said roacside means is arranged in and controlled by the said roadside inductor circuit. 7. A .roadsldeunductive apparatus comprising a roadside inductor circuit changeable from a closed circuit of lowohmic IGSlSt, ance to a closed tuned circuit to suit differerent types of vehicle carried inductive apparatus with which said roadside inductor circuit is cooperable, and roadside means substantially resonant toone of said diiierent types of vehicle carried inductive apparatus and adapted to be influenced thereby. for producing the change to the closed tuned roadside inductor circuit.

8. A roadside inductive apparatus comprising a roadside inductor circuit operable to form a closed circuit of a given impedance to suit one of diderent types of vehicle carried inductive apparatus with which said roadside inductor circuit is cooperable, and roadside means substantially resonant to said one or said different types of vehicle carried inductive apparatus and adapted to be influenced thereby for operating said roadside circuit to its said closed circuit given impedance condition.

9. A. roadside inductive apparatus comprising a roadside inductive means operable differently with dififerent types of vehicle carried inductive apparatus with which said roadside inductive means is cooperable; and roadside mechanism substantially resonant to one of said diilerent types of vehicle carried inductive apparatus and adapted to be influenced thereby for determining the operating characteristic of said roadside inductive means cooperable with said one of the types of vehicle carried inductive apparatus.

10. A roadside inductive apparatus comprising a roadside inductive means operable difierently with different types OfVelilCle, carried inductive apparatus with which said roadside inductive ineansis cooperable and roadside mechanism controlled by said roadside inductive means, said roadside mechanism being substantially resonant to one of said diiiferent types of vehicle carried inductive apparatus and adapted to'be influenced thereby through said inductive means for determining the operating characteristic of said roadside inductive means cooperable with said one of the types of vehicle carried inductive apparatus.

11. A roadside inductive apparatus comprising an inductor a circuit thereicr, changeable circuit connections for chang ng the constants of said circuit to a given 1mpedance, and a resonance governed relay controlled by said circuit for governing-the operation of said circuit connections.

12.A roadside inductive apparatus comprising an inductor a circuit therefor, changeable circuit-connections for changing the constants of said circuit iromoneim'pedance to another, and a resonance governed relay controlled by said circuit for governing the operation ofsaid circuit connections.

13. 1%. roadside inductive apparatus comprising an inductor, a circuit therefor devoid of an energy source, changeable circuit connections for changing the constants of said circuit to produce a given impedence, and a resonance governed relay controlled by said circuit for governing theoperation of said circuit connections. 1a. A roadside inductive apparatus comprising an inductor, a circuit therefor, changeable circuit; connections for changing the constants of said circuit from oneimpedance to'another, and a resonance governed device controlled by said circuit for goverm ing the operation of said circuitconnections 15. A roadside inductive apparatus coniprising a roadside inductive means operable ditfe 'ently with difierent typesof vehicle car? ried inductive apparatus with which said roadside inductive means is cooperable, and a combination tra11sfomner-relay differently influenced by said difierent types of vehicle carriedinductive apparatus'for determining the operating characteristics or" said roadside inductive means whereby the roadside inductive means is selectively conditioned by a given type of vehicle carried inductive. apparatus for cooperation therewith.

. 16. A. roadside inductive apparatus comprising a roadside. inductor circuit having constants changeable to suit different types of vehicle carried inductive apparatus-with which said roadside inductor circuitiscooperable, and a: combination transformerrelay difierently influenced by said different types of vehicle carried inductive apparatus for determining the circuit, constants of said roadside inductor circuit whereby said circuit is selectively conditioned by a given ype ofivehicle carried apparatus for co,- operation therewith. 5 17.. A roadside inductive; apparatus comprising a roadside inductivemeansoperable diilerently with different types of vehicle carried inductive apparatus with which said roadside inductive means is cooperali le,-and roadside mechanism diiterentlyfinfiuenced by said different. types of vehicle carried in-. ductive apparatus for'determining the opei atin characteristics of said roadside inductive means whereby the roadside inductive means is selectively conditioned by a given type of vehicle carried inductive apparatus for cooperation therewith, said roadside mechanism including a transformer having a resonant secondary circuit.

18. A roadside inductive apparatus comprising a roadside inductive means operable diifcrently with different types of vehicle carried inductive apparatus with which said roadside inductive means is cooperable, and roadside mechanism differently influenced by said different types of vehicle carried inductive apparatus for determining the operating characteristics of said roadside inductive means whereby the roadside inductive means is selectively conditioned by a given type of vehicle carried inductive apparatus for cooperation therewith, said roadside mechanism comprising a transformer having a resonant secondary circuit and a relay element controlled by said transformer secondary.

19. A roadside inductive apparatus comprising a roadside inductor circuit having constants changeable to suit different types of vehicle carried inductive apparatus with which said roadside inductor circuit is cooperable, and roadside means differently influenced by said different types of vehicle carried inductive apparatus for determining the circuit constants of said roadside inductor circuit whereby said circuit is selectively conditioned by a given type of vehicle carried apparatus for cooperation therewith, said roadside means comprising a combination transformer-relay having its primary in said inductor circuit and having a resonant secondary.

20. A roadside inductive apparatus comprising a roadside inductor circuit having constants changeable-to suit different types of vehicle carried inductive apparatus with which said roadside inductor circuit is cooperable, and roadside means differently influenced by said different types of vehicle carried inductive apparatus for determining the circuit constants of said roadside inductor circuit whereby said circuit is selectively conditioned by a given type of vehicle carried apparatus for cooperation therewith, said roadside means comprising a transformer having its primary in said inductor circuit and a relay element controlling said circuit connected to the secondary of the transformer.

21. The roadside inductive apparatus of claim 20 in which the transformer secondary is resonant to one of said types of vehicle carried apparatus.

22. A roadside inductive apparatus comprising an ind ctor, a circuit therefor, changeable circuit connections for changing the constants of said circuit, and a combination transformer-relay controlled by said circuit for governing the operation of said circuit connections.

23. A roadside inductive apparatus comprising an inductor, a circuit therefor, changeable circuit connections for changing the constants of said circuit, and a roadside mechanism controlled by said circuit for governing the operation of said circuit connections, said roadside mechanism including a transformer having its primary in said circuit and having a resonant secondary.

24. A roadside inductive apparatus comprising an inductor, a circuit therefor, changeable circuit connections for changing the constants of said circuit, and a roadside mechanism controlled by said circuit for governing the operation of said circuit connections, said roadside mechanism comprising a transformer having its primaryin said circuit and a relay element for the changeable circuit connections connected to the secondary of the transformer.

25. The roadside inductive apparatus of claim 2% in which the secondary of the transformer comprises a resonant circuit.

Signed at New York city, in the county of New York and State of New York this 2nd day of June A. D. 1928.

LESTER L. JONES. 

